This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 470 |
| 3 | 1094 |
| 4 | 7856 |
| 5 | 128534 |
| 6 | 201539 |
| 7 | 3293081 |
| 8 | 23435699 |
| 9 | 53805155 |
| 10 | 382911281 |
| 11 | 6256309475 |
| 12 | 9809462822 |
| 13 | 160274811896 |
| 14 | 1140616029542 |
| 15 | 2618697452438 |
| 16 | 18636292598096 |
| 17 | 304494582579398 |
| 18 | 477426555904883 |
| 19 | 7800575092244921 |
| 20 | 55513782134933123 |
| 21 | 127452004956911987 |